/**
 * @template T
 * @extends {Set<T>}
 */
export class FrozenSet<T> extends Set<T> {
    /**
     *
     * @param  {readonly T[]} values
     */
    constructor(values: readonly T[]);
    frozen: boolean;
    /**
     * @deprecated
     * @override
     * @param {never} value
     * @returns {this}
     */
    override add(value: never): this;
    /**
     * @deprecated
     * @override
     * @param {never} _value
     * @returns {boolean}
     */
    override delete(_value: never): boolean;
}
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